the other, the older brother, tamerlan tsarnaev, is dead. the younger brother in police custody at a hospital down the street from our location here after this tense and harrowing stand-off. he is listed in serious condition expected to recover. the suspect discovered in the backyard of a home in watertown after the homeowner noticed blood on his boat and part of a tarp removed. the stepson of the boat owner talked to greta late last night shortly after the arrest was made. >> the tarp on the boat, as you've described, had kind of lifted, which he found strange. he went over to the boat for a closer look. he found a strap that had been cut. not torn or worn through. it had been deliberately cut. he then was kind of stranged out by the whole thing. noticed a small amount of like blood in this area and then he took his little stepladder that he uses to enter and exit the boat. he went under the tarp, saw a small pool of blood, immediately there looked forward and because the tarp obscured a lot of sun line, it was gray and cloudy for ait here,